Sony NP-FW50 Batteries: Charge 'em without AC Power - Alphatracks

I did have a backup camera which used the same Sony NP-FW50 battery. Could I use the backup camera as an improvised battery charger?

Li-Ion NP-FW50 Hi Capacity Battery for Sony Alpha a6400 ILCE-6400

Compatible Replacement Battery for: Bower XPDSFW50 Dantona CAM-FW50 DigiPower BPFW50 Digital Concepts VIV-SB-FW50 Duracell DR9954 Empire BLI-395

Synergy Digital Camera Battery, Compatible with Sony NP-FW50 Digital Camera Battery - Ultra Hi-Capacity - (1500 mAh 7.2v)

JYJZPB Np-fw50 Camera Battery Replacement and Dual Battery Charger for Sony A6000 Sony a6400 A6300 A6500 A7 A7ii A7RII A7sii a7S

JYJZPB NP-FW50 Replacement Battery Charger Set Dual Channel Compatible for Sony Alpha A6000 A6400 A6500 A6300 A6100 ZV-E10 A7 A7II A7RII A7SII A7S A7S2 A7R A7R2 A5100, Camera Batteries Charger Case

Artman 3-Pack NP-FW50 Battery and Upgraded 3-Slot LCD Charger Compatible with Sony ZV-E10, Alpha A6000 A6300 A6400 A6500 A5000 A5100 A7 A7II A7R A7RII A7S A7SII RX10 II III Camera

Sony NP-FW50 Batteries: Charge 'em without AC Power - Alphatracks

Sony NP-FW50 Batteries: Charge 'em without AC Power - Alphatracks

3rd Party NP-FW50 Battery Recommendations: Sony Alpha / NEX E-mount (APS-C) Talk Forum: Digital Photography Review

【Powerful Battery Capacity】7.4V, 1500mAh rechargeable Li-ion batteries use high quality cells for longer battery life with no memory effect. 【Comes

Pickle Power NP-FW50 Battery, 2 x 1500mAh Batteries for Sony Alpha A6500, A6400, A6300, A6000, A3000, A5000, A5100, A7II, A7RII, A7, RX10 NEX-3/5/7

SMALLRIG NP-FW50 1030mAh Camera Battery for Sony A7S II / A7R II/ZV-E10, USB-C Fast Charging Rechargeable Camera Battery for Sony A7, A7S, A7R, A6400, A6500, A6300, A5000, A5100, A6000, RX10-4330

Replacement Battery and Charger for Sony NP-FW50

SMALLRIG NP-FW50 1030mAh Camera Battery for Sony A7S II / A7R II/ZV-E10, USB-C Fast Charging Rechargeable Camera Battery for Sony A7, A7S, A7R, A6400, A6500, A6300, A5000, A5100, A6000, RX10-4330